<html lang="en">
<head>
  <meta charset="UTF-8">
  <meta http-equiv="X-UA-Compatible" content="IE=edge">
  <meta name="viewport" content="width=device-width, initial-scale=1.0">
  <title>H 指数</title>
</head>
<body>
  <script>
    function fn(citations) {
      citations.sort((a, b) => a - b);
      let h = 0, i = citations.length - 1;
      while (i >= 0 && citations[i] > h) {
        h++;
        i--;
      }
      return h
    }
    console.log(fn(['cat', 'cats', 'catsdogcats', 'dog', 'dogcatsdog', 'hippopotamuses', 'rat', 'ratcatdogcat']))
  </script>
</body>
</html>